Reenforcing corners for boxes



Jul 22 1924. 1,502,017 1 R. C. CARLSON REENFORCING CORNERS FOR BOXESFiled Sept. 18 1922 Patented July 22, 1924.

- UNIT ROBERT o. canteen, orcH IcAeo, I LInoIs.

REENFO RGING CORNERS FOR BOXES.

Application filed September 18,1922. Se-rial No. 588,777.

To all whom it may concern:

Be it known that I, Ronnnr C. CAnLsoN, a citizen of the United States,and resident of Chicago, in the county of Cook and State of Illinois,have invented a certain new and useful Improvement in ReenforcingCorners for Boxes, of which the following is a full, clear, concise, andexact description, reference being had to the accompanying drawings,forming a part of this specification.

This invention relates to reenforcing cor- 11ers for boxes. Boxes orcartons made of corrugated board or other forms of fibre are ordinarilymade of one piece of board which is scored and folded, certain edgesbeing brought together and secured to one another to complete theenclosure, The meetin edges are frequently united by means of fabricglued to the. surface of the board and overlapping the joint between theedges. Boxes thus constructed are weakest at the corners, there being atendency for the corrugated board or fibre to tear along the scores andfolds and along the united edges of the material. My invention relatesto a reenforcing fabric having a U-shaped slot cut in it in a directionbias to the fabric threads, the fabric being preferably gummed on oneside for ready application to the box corners. The invention alsoembraces a fibre box having reenforcing corners of the type describedapplied thereto. My invention is illustrated in the accompanyingdrawing, in which Figure l is an isomet-rica-l drawing of a fibre boxhaving all of its corners protected with bias reenforcing fabric;

Figure 2 illustrates the application of the fabric to a box covercorner; and

Figure 3 illustrates the fabric as it is ordinarily applied to the fibrebefore the latter is shaped into a container.

The reenforcing fabric shown at 4 is provided with a slot 5 cut on thebias to the threads generally illustrated by the diagonal cross lines.The reenforcing member is preferably cut round, though this featurerelates only to the appearance and it is ob- ViOllS that other shapesmay be used without affecting the utility of the invention.

Although it is obvious that the reenforcing members may be applied tothe boxes in various ways, I have found it preferable to apply gum toone side of the reenforcing fabric so that it may be attached to the boxmerely. by wetting. It is to be understood that the reenforcements maybe applied either after the box has been completely formed or may beapplied by the manufacturer who ordinarily sells the box in knockdown orflat condition.

Although I have described the reenforcing members as being made ofmaterial cut on thebias, it is also possible to construct thesereenforcing devices of material which has no distinct weave, but whichresists tear in at least one direction. lVhen material of this kind isused, the U-shaped cut is made in the material in the same generaldirection as that in which the material resists tear.

Although I have shown and described my invention as applied to boxes, itis to be understood that it may be applied to any form of device havingfolds or corners which are improved by reenfo-rcin g.

1 claim:

1. In combination with a box having a rectangular corner formed by sidewalls and superposed flaps, a corner reenforcing member of textilefabric having an open ended slot and adhering to the side walls andflaps, those portions of the reenforcing member adjacent the open end ofsaid slot adhering to the flaps and lying in superposed relation, saidreenforcing member being folded. over the side wall junction and thejunctions between the side walls andflaps along lines substantially at45 to both the warp and the weft of the fabric, whereby said warp andweft strands substantially equally re sist disruption of the reenforcingmember formed from a sheet folded along two lines at right angles, saidsheet being cut along one of said folds outwardly from the intersectionof said folds, the two quarters thus formed adjacent said out beingfoldedinto mutually superimposed relation when the box is completelyformed, of a fabric reingvto the superimposed lateral edge of the 10enforcing member adhering to said corner, cut in said sheet forprotecting and reenforcsaid reenforcing member having a slot cut lngthelatter edge.

from substantially the intersection of said In Witness whereof, Ihereunto subscribe folds, said slot extending at SIlOl'L an angle myname this 13th day of September, 1922.

to the Weave of said iabric that tearing: ROBERT C. CARLSON. strainsalong said folds are borne substanlVitnes'ses: tially equally by thewarp and- Weft of said EDNA V. GUsTAFSON,

fabric, one lateral edge of said slot extend DAGMAR PETERSON.

